The downward flux by the atmosphere is the same as the real greenhouse effect. This flux is excatly the same as the sum of four energy fluxes: LW radiation absorption 155.6 + SW radiation absotpion 75.0 + Latent heating 90.8 + 24.2 = 345.6 W/m2
ClimatExam Scientific analyses of the climate change and global warming by Dr. Antero Ollila
Slideshow 3: Climate sensitivity
Instruction: Click the firtst slide and it will start the slideshow in the expanded mode. You can use the navigation arrows on the screen or the key board navigation arrows to move forward or backward.